Sensitivity of a response to the composition of an (α,n) neutron source - 24235
- Los Alamos National Laboratory, P.O. Box 1663 MS F663, Los Alamos, New Mexico, 87545, 505-667-7941 (United States)
- Purdue University, 400 Central Drive, West Lafayette, Indiana, 47907, 765-494-5739 (United States)
We derive the sensitivity of a response to the composition of a homogeneously mixed (α,n) neutron source. We use the mathematical descriptions of the (α,n) neutron source rate density and spectrum that are used by SOURCES4C; specifically, a material's α-particle stopping power is given by the Bragg-Kleeman relationship. The (α,n) neutron source is computed for each combination of α particle emitter (source isotope) and (α,n) target isotope. In addition, each isotope in the material has an effect on the (α,n) neutron source because of its contribution to the α particle stopping power. The derivative of the total (α,n) source rate density with respect to each isotope density is exact, but the derivative of the energy spectrum is approximated using an appropriate spectrum. Numerical results using the total neutron leakage from the BeRP ball demonstrate the correctness and accuracy of the sensitivities. (authors)
- Research Organization:
- American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 23055064
- Resource Relation:
- Conference: RPSD 2018: 20. Topical Meeting of the Radiation Protection and Shielding Division of ANS, Santa Fe, NM (United States), 26-31 Aug 2018; Other Information: Country of input: France; 12 refs.; available on CD Rom from American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (US)
- Country of Publication:
- United States
- Language:
- English
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